The New Holland site doesn't list a 7108 loader. A 7106 (for fairly small tractors like 1220's) is listed with a lift capacity of (I think) 600 lbs. A 7308 loader is listed for somewhat larger tractors, including 1920's). The lift capacity of a 7308 is given as 776 - 1,020 lbs.

Of course, lift capacity and maximum weight are somewhat different things. The desired speed of the lift, relief valve setting, whether the lift goes to full height and whether the lift starts above ground level affect how much a loader will lift. Things like ballast and whether the tractor will be driven with the load and over what kinds of ground affect whether a lift should be tried. The 'should be tried' question also is different than maximum weight it will lift. It's not easy to come up with a simple answer, but I hope the site dope helps.